#rtdn, #rmk, #rnn {
    text-align: right;
}

.input {
    text-align: left;
    padding-left: 10px; /* margin-left bi loi~ ??? */
}

#f_name {
    background-color: blue;
    font-weigth: bold;
    color: white;
}

table {
    width: 289px;
    border: 1px solid black;
    border-collapse: collapse; /* this is why set padding and margin is useless in #f_name */
}